Subversion Repositories bustap-jtag

//**************************************************************

// Module             : up_monitor.v

// Platform           : Windows xp sp2

// Simulator          : Modelsim 6.5b

// Synthesizer        : QuartusII 10.1 sp1

// Place and Route    : QuartusII 10.1 sp1

// Targets device     : Cyclone III

// Author             : Bibo Yang  (ash_riple@hotmail.com)

// Organization       : www.opencores.org

// Revision           : 2.1 

// Date               : 2012/03/15

// Description        : Top level glue logic to group together 

//                      the JTAG input and output modules.

//**************************************************************

`timescale 1ns/1ns

module up_monitor (

        input        clk,

        input        wr_en,rd_en,

        input [15:2] addr_in,

        input [31:0] data_in

);

/////////////////////////////////////////////////

// Registers and wires announcment

/////////////////////////////////////////////////

// for CPU bus signal buffer

reg         wr_en_d1,rd_en_d1;

reg  [15:2] addr_in_d1;

reg  [31:0] data_in_d1;

// for capture address mask

wire [35:0] addr_mask0,addr_mask1,addr_mask2 ,addr_mask3 ,addr_mask4 ,addr_mask5 ,addr_mask6 ,addr_mask7 ,  // inclusive

            addr_mask8,addr_mask9,addr_mask10,addr_mask11,addr_mask12,addr_mask13,addr_mask14,addr_mask15;  // exclusive

wire [15:0] addr_mask_en = {addr_mask15[32],addr_mask14[32],addr_mask13[32],addr_mask12[32],

                            addr_mask11[32],addr_mask10[32],addr_mask9 [32],addr_mask8 [32],

                            addr_mask7 [32],addr_mask6 [32],addr_mask5 [32],addr_mask4 [32],

                            addr_mask3 [32],addr_mask2 [32],addr_mask1 [32],addr_mask0 [32]};

wire        addr_wren = addr_mask15[35];

wire        addr_rden = addr_mask15[34];

reg         addr_mask_ok;

// for capture address+data trigger

wire [55:0] trig_cond;

wire        trig_aden = trig_cond[55];

wire        trig_daen = trig_cond[54];

wire        trig_wren = trig_cond[51];

wire        trig_rden = trig_cond[50];

wire        trig_en   = trig_cond[49];

wire        trig_set  = trig_cond[48];

wire [15:0] trig_addr = trig_cond[47:32];

wire [31:0] trig_data = trig_cond[31:0];

reg         trig_cond_ok,trig_cond_ok_d1;

// for capture storage

wire [49:0] capture_in;

wire        capture_wr;

// for pretrigger capture

wire [9:0] pretrig_num;

reg  [9:0] pretrig_cnt;

wire pretrig_full;

wire pretrig_wr;

reg  pretrig_wr_d1,pretrig_rd;

/////////////////////////////////////////////////

// Capture logic main

/////////////////////////////////////////////////

// bus input pipeline, allowing back-to-back/continuous bus access

always @(posedge clk)

begin

        wr_en_d1   <= wr_en;

        rd_en_d1   <= rd_en;

        addr_in_d1 <= addr_in;

        data_in_d1 <= data_in;

end

// address range based capture enable

always @(posedge clk)

begin

        if (((addr_in[15:2]<=addr_mask0[31:18] && addr_in[15:2]>=addr_mask0[15:2] && addr_mask_en[ 0]) ||

             (addr_in[15:2]<=addr_mask1[31:18] && addr_in[15:2]>=addr_mask1[15:2] && addr_mask_en[ 1]) ||

             (addr_in[15:2]<=addr_mask2[31:18] && addr_in[15:2]>=addr_mask2[15:2] && addr_mask_en[ 2]) ||

             (addr_in[15:2]<=addr_mask3[31:18] && addr_in[15:2]>=addr_mask3[15:2] && addr_mask_en[ 3]) ||

             (addr_in[15:2]<=addr_mask4[31:18] && addr_in[15:2]>=addr_mask4[15:2] && addr_mask_en[ 4]) ||

             (addr_in[15:2]<=addr_mask5[31:18] && addr_in[15:2]>=addr_mask5[15:2] && addr_mask_en[ 5]) ||

             (addr_in[15:2]<=addr_mask6[31:18] && addr_in[15:2]>=addr_mask6[15:2] && addr_mask_en[ 6]) ||

             (addr_in[15:2]<=addr_mask7[31:18] && addr_in[15:2]>=addr_mask7[15:2] && addr_mask_en[ 7])

            ) //inclusive address range set with individual enable: addr_mask 0 - 7

            &&

            ((addr_in[15:2]>addr_mask8 [31:18] || addr_in[15:2]<addr_mask8 [15:2] || !addr_mask_en[ 8]) &&

             (addr_in[15:2]>addr_mask9 [31:18] || addr_in[15:2]<addr_mask9 [15:2] || !addr_mask_en[ 9]) &&

             (addr_in[15:2]>addr_mask10[31:18] || addr_in[15:2]<addr_mask10[15:2] || !addr_mask_en[10]) &&

             (addr_in[15:2]>addr_mask11[31:18] || addr_in[15:2]<addr_mask11[15:2] || !addr_mask_en[11]) &&

             (addr_in[15:2]>addr_mask12[31:18] || addr_in[15:2]<addr_mask12[15:2] || !addr_mask_en[12]) &&

             (addr_in[15:2]>addr_mask13[31:18] || addr_in[15:2]<addr_mask13[15:2] || !addr_mask_en[13]) &&

             (addr_in[15:2]>addr_mask14[31:18] || addr_in[15:2]<addr_mask14[15:2] || !addr_mask_en[14]) &&

             (addr_in[15:2]>addr_mask15[31:18] || addr_in[15:2]<addr_mask15[15:2] || !addr_mask_en[15])

            ) //exclusive address range set with individual enable: addr_mask 8 - 15

        )

                addr_mask_ok <= (addr_rden && rd_en) || (addr_wren && wr_en);

        else

                addr_mask_ok <= 0;

end

// address+data based capture trigger

always @(posedge clk)

begin

        if (trig_en==0) begin                      // trigger not enabled, trigger gate forced open

                trig_cond_ok    <= 1;

                trig_cond_ok_d1 <= 1;

        end

        else if (trig_set==0) begin                // trigger enabled and trigger stopped, trigger gate forced close

                trig_cond_ok    <= 0;

                trig_cond_ok_d1 <= 0;

        end

        else begin                                 // trigger enabled and trigger started, trigger gate conditional open

                if ((trig_aden? trig_addr[15:2]==addr_in[15:2]: 1) && (trig_daen? trig_data==data_in: 1) &&

                    (trig_wren? wr_en                         : 1) && (trig_rden? rd_en             : 1) &&

                    (rd_en || wr_en))

                        trig_cond_ok <= 1;

                trig_cond_ok_d1 <= trig_cond_ok;

        end

                                              // trigger gate kept open until trigger stoped

end

wire trig_cond_ok_pulse = trig_cond_ok & !trig_cond_ok_d1;

// generate capture wr_in

assign capture_in = {trig_cond_ok_pulse,wr_en_d1,addr_in_d1[15:2],2'b00,data_in_d1[31:0]};

assign capture_wr =  trig_cond_ok_pulse | (addr_mask_ok & trig_cond_ok);

// generate pre-trigger wr_in

assign pretrig_full = (pretrig_cnt >= pretrig_num) || trig_cond_ok;

assign pretrig_wr = (!trig_en || (trig_en && !trig_set))? 1'b0 : (trig_cond_ok? 1'b0 : addr_mask_ok);

always @(posedge clk)

begin

        if      (!trig_en || (trig_en && !trig_set)) begin

                pretrig_cnt  <= 10'd0;

                pretrig_wr_d1<= 1'b0;

                pretrig_rd   <= 1'b0;

        end

        else if (!pretrig_full) begin

                pretrig_cnt  <=  pretrig_cnt + addr_mask_ok;

                pretrig_wr_d1<= 1'b0;

                pretrig_rd   <= 1'b0;

        end

        else if (pretrig_full) begin

                pretrig_cnt  <= pretrig_cnt;

                pretrig_wr_d1<= pretrig_wr;

                pretrig_rd   <= pretrig_wr_d1;

        end

end

/////////////////////////////////////////////////

// Instantiate vendor specific JTAG functions

/////////////////////////////////////////////////

// index 0, instantiate capture fifo, as output

virtual_jtag_adda_fifo u_virtual_jtag_adda_fifo (

        .clk(clk),

        .wr_in(capture_wr || pretrig_wr),

        .data_in(capture_in),

        .rd_in(pretrig_rd)

        );

defparam

        u_virtual_jtag_adda_fifo.data_width     = 50,

        u_virtual_jtag_adda_fifo.fifo_depth     = 512,

        u_virtual_jtag_adda_fifo.addr_width     = 9,

        u_virtual_jtag_adda_fifo.al_full_val    = 511,

        u_virtual_jtag_adda_fifo.al_empt_val    = 0;

// index 1, instantiate capture mask, as input

virtual_jtag_addr_mask u_virtual_jtag_addr_mask (

        // inclusive

        .mask_out0(addr_mask0),

        .mask_out1(addr_mask1),

        .mask_out2(addr_mask2),

        .mask_out3(addr_mask3),

        .mask_out4(addr_mask4),

        .mask_out5(addr_mask5),

        .mask_out6(addr_mask6),

        .mask_out7(addr_mask7),

        // exclusive

        .mask_out8(addr_mask8),

        .mask_out9(addr_mask9),

        .mask_out10(addr_mask10),

        .mask_out11(addr_mask11),

        .mask_out12(addr_mask12),

        .mask_out13(addr_mask13),

        .mask_out14(addr_mask14),

        .mask_out15(addr_mask15)

        );

defparam

        u_virtual_jtag_addr_mask.mask_index     = 4,

        u_virtual_jtag_addr_mask.mask_enabl     = 4,

        u_virtual_jtag_addr_mask.addr_width     = 32;

// index 2, instantiate capture trigger, as input

virtual_jtag_adda_trig u_virtual_jtag_adda_trig (

        .trig_out(trig_cond),

        .pnum_out(pretrig_num)

        );

defparam

        u_virtual_jtag_adda_trig.trig_width     = 56,

        u_virtual_jtag_adda_trig.pnum_width     = 10;

endmodule